Thanks for your post Eric.
I had a very confusing chat with the tech guys at Curry’s about the HDMI ports on modern tv’s. He said that on HDMI ports on modern tv’s there is a block that stops computer signals. It’s to stop illegal streaming.

I’m just wondering wether an io box would solve this or wether it’s just for latency issues.

[dan crouch]"He said that on HDMI ports on modern tv’s there is a block that stops computer signals. It’s to stop illegal streaming. "

Im not sure why they would mention that unless you were planning to "try" and hook-up a digital cable receiver into your Avid to record television feed.
If you're only using your HDMI Display as a viewer from your computer (Avid or whatever), you dont need to worry about that.